<p>A systematic air quality assessment study was carried out at Rajapur opencast mine in Jharia Division as per standard guideline. The average concentration of SPM, PM₁₀and PM_2.5 concentrations were observed to be in the range of 294 to 965&mu;g/m3, 100 to 498 &mu;g/m3 and 85 to 296 &mu;g/m³ respectively. The SO₂ and NOx concentration were in the range of 48.2 to 98.2&mu;g/m3 and 32.8 to 149.39 &mu;g/m³ respectively. The trace metals concentration in PM₁₀, e.g., lead, nickel, arsenic etc. were also analyzed by Atomic Absorption Spectroscopy technique and were observed to be&nbsp;&nbsp; 0.380 &plusmn; 0.009 &mu;g/m³, 0.06 &plusmn;0.02 &mu;g/m³, and 0.00432&plusmn;0.028 &mu;g /m³ respectively. The observed concentrations were then compared with National ambient air quality standard (NAAQS, 2009) and Ambient Air quality Standard for existing as well as new Coal Mines (CMS, 2000). Most of them were found exceeding the statutory norms.</p>